The invention discloses bio-based
polyester with high
glass transition temperature and high
mechanical strength as well as a preparation method and application of the bio-based
polyester. The structure of the bio-based
polyester with the high
glass transition temperature and the high
mechanical strength is as shown in a formula (1): # imgabs0 #, x is an integer of 5-70, y is an integer of 0-100, z is an integer of 30-100, and R is dihydric
alcohol residues with the
carbon atom number of 2-8. The
glass transition temperature of the bio-based polyester with high glass
transition temperature and high
mechanical strength is 69.6 DEG C to 174.6 DEG C, the tensile strength of the bio-based polyester with high glass
transition temperature and high mechanical strength is 62 MPa to 134 MPa, and the tensile modulus of the bio-based polyester with high glass
transition temperature and high mechanical strength is 2134 MPa to 3102 MPa. The preparation method disclosed by the invention is simple, and the obtained polyester has high glass transition temperature, high tensile strength and
thermal stability and can be widely applied to the fields of fire-fighting equipment, baby milk bottles, water cups, kitchen electric products, packaging inner films, device supports, optical base films, decorative materials, automobile accessories and the like.